"-U" stop activity flag seem to be incorrectly matched as "U " for non-public stop

[mk-fg]

One of the schedules for G80225 has this sequence of stops in raw CIF file:

BSNG802251709031709100000001 PXX1A850252123540003 DMUE   100      B S T        O
...
LIERROLLC           1258 00000000                     1
LIDUNDCJ            1306H00000000
CRDUNDETB XX1A850252123540003 DMUE   090      B S T                SR025200
LIDUNDETB 1307H1311H     000000004        K -U
LICMPRDNJ           1314 00000000
...

Here "LIDUNDETB" is a location=DUNDETB crs=DEE stop, with 0000 for public stop times and "K -U" for activity flags, which gets translated to this GTFS trip:

  [81568] headsign=G80225 svc=275 svc_days=2:
    <TS ......7 [2017-09-03 2017-09-10] {}>
    stop sequence:
      GLQ 11:45 11:45 P-
      STG 12:11 12:11 PD
      DBL 12:17 12:18 PD
      GLE 12:29 12:29 PD
      PTH 12:45 12:46 PD
      DEE 13:07 13:11 P-
      ARB 13:28 13:28 PD
      ...

More info (this train has a lot of non-public stops):
https://gist.github.com/mk-fg/1659e402c7b98fead612a497c07a0e52

DEE 13:07 13:11 P- ("P-" = "pickup only") seem to be derived from scheduled times, with pickup-only matched from "-U" ("stops to attach vehicles") as "U " ("take up passengers"), which are different activity flags.

This GTFS trip for this train_uid should not have "DEE" stop at all, as it doesn't have neither passenger pickup nor dropoff.

[mk-fg]

sequence of stops in raw CIF file:

Additional note:
Everything seem to be parsed correctly from CIF to mysql, as also shown on the linked gist, only used raw CIF here because I was lazy to make mysql query for this case :)