Collinear test FAILED

Dear MadGraph5_aMC@NLO team

I am trying to generate a bbbar + missing energy signal sample at NLO in the 5FS.

The UFO I am using is here

https://www.dropbox.com/s/omlrsa98f8wp6sp/Pseudoscalar_2HDM.tgz?dl=0

The commands I am using are

import model Pseudoscalar_2HDM-bbMET_5FS

generate p p > j j xd xd~ [QCD]

output ppbbxx_5FS

launch

The output that I get reads as follows

INFO: Output of the failing test:
 Enter 0 to compute MC/MC(limit)
       1 to compute MC/ME(limit)
       2 to compute ME/ME(limit)
 Enter xi_i, y_ij to be used in coll/soft tests
  Enter -2 to generate them randomly
 Enter number of tests for soft and collinear limits
 A PDF is used, so alpha_s(MZ) is going to be modified
 Old value of alpha_s from param_card: 0.11799999999999999
  ****************************************

       NNPDFDriver version 1.0.3
   Grid: NNPDF23nlo_as_0119_qed_mem0.grid
  ****************************************
 New value of alpha_s from PDF nn23nlo: 0.11899999999999999
WARNING: the value of maxjetflavorspecified in the run_card ( 4) is inconsistent with the number of light flavours inthe model. Hence it will be set to: 5
 Give FKS configuration number ("0" loops over all)

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 1
 FKS partons are: i= 7 j= 1
 with PDGs: i= 21 j= 2

 Enter graph number (iconfig), '0' loops over all graphs
Using random seed offsets: 1 , 4 , 0
  with seed 32
 Ranmar initialization seeds 10730 9410
tau_min 1 1 : 0.20000E+02 -- 0.64000E+03
tau_min 2 1 : 0.20000E+02 -- 0.64000E+03
tau_min 3 1 : 0.60000E+02 0.60000E+02 0.64000E+03
tau_min 4 1 : 0.60000E+02 0.60000E+02 0.64000E+03
tau_min 5 1 : 0.20000E+02 -- 0.64000E+03
tau_min 6 1 : 0.20000E+02 -- 0.64000E+03

 Soft tests done for (Born) config 1
 Failures: 0
     Soft test 1 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 1
Collinear test 1 PASSED. Fraction of failures: 0.01

 =================================================

[...]

Soft tests done for (Born) config 1
 Failures: 0
     Soft test 4 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 1
Collinear test 4 PASSED. Fraction of failures: 0.01

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 5
 FKS partons are: i= 7 j= 1
 with PDGs: i= -2 j= 21

 Enter graph number (iconfig), '0' loops over all graphs

 Soft tests done for (Born) config 1
 Failures: 0
     Soft test 5 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 30
Collinear test 5 FAILED. Fraction of failures: 0.30

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 6
 FKS partons are: i= 6 j= 2
 with PDGs: i= 2 j= 21

 Enter graph number (iconfig), '0' loops over all graphs

 Soft tests done for (Born) config 1
 Failures: 0
     Soft test 6 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 41
Collinear test 6 FAILED. Fraction of failures: 0.41
Error detected in "launch -f"
write debug file /Users/haisch/Documents/Codes/MG5_aMC_v2_6_0/ppbbxx_5FS/run_03_tag_1_debug.log
If you need help with this issue please contact us on https://answers.launchpad.net/mg5amcnlo
aMCatNLOError : Some tests failed, run cannot continue.
        Please check that widths of final state particles (e.g. top) have been set to 0 in the param_card.dat.

The process

p p > j j xd xd~

receives contribution from two spin-0 pseudoscalar particles, h3 and h4, that are a mixture of the normal
pseudoscalar A in 2HDMs and a extra singlet P. The mass eigenstates h3 and h4 both can decay to dark
matter, i.e. xd xd~

To understand what is going on I have also generated

generate p p > j j h3 [QCD]

generate p p > j j h4 [QCD]

and computed the cross section. In this case I do not get an error.

Furthermore,

generate p p > j j xd xd~ / h3 [QCD]

also works fine, while

generate p p > j j xd xd~ / h4 [QCD]

again fails the collinear tests

Like in the case

https://answers.launchpad.net/mg5amcnlo/+question/255905

the problems seems to be that in the case

generate p p > j j xd xd~

there are too many relevant scales in the problem (DM mass, h3 and h4
mass, etc.)

In fact by playing around with the input I managed to get rid of the error
concerning the collinear tests. Likewise, I am also able to get rid of the
error by increasing the value of

max_fail

in

SubProcesses/test_soft_col_limits.f

from 0.3 to 0.5

Now my questions:

1) Should I worry that for some parameter choices with largely separated scales close to 50%
of the points fail the collinear tests?

2) Besides changing the file test_soft_col_limits.f by hand is there another way to set the
parameter max_fail to a higher value? Or maybe even skip over the soft and collinear tests
altogether?

Apologies for the longish question and thanks in advance for an answer.

Best,

Uli