Did the same with the default 737, and the same settings, no problems whatsoever. Jetway, Fuel, Catering, Boarding, all working fine. Boarding ends normally.
Is that a freeware airplane ? If yes, please provide some download links, and attach your GSX.CFG for it.
TDS is freeware but now I have tested the Wilco FeelThere EMB175 and the same problem.
[aircraft]
nosegear = 16.22
refueling = 1
iscargo = 0
trafficcones = 1
preferredexit = 0
wingrootpos = 1.80 -3.43 0.00
wingtippos = 17.91 -7.01 0.00
fuelpos = 0.00 0.00 0.00
waterpos = 0.00 0.00 0.00
lavatorypos = 0.00 0.00 0.00
engine1pos = -5.08 5.40 0.00
engine2pos = 5.08 5.40 0.00
engine3pos = 0.00 0.00 0.00
engine4pos = 0.00 0.00 0.00
[exit1]
pos = -1.72 15.30 0.28 1.00
code = 1
name = Exit Front
[exit2]
pos = -1.47 -10.80 0.33 -10.00
code = 3
name = Exit Rear
[exit3]
remove = 1
[exit4]
remove = 1
[service1]
flip = 1
code = 4
name = Front Service
[service2]
flip = 4
code = 4
name = Rear Service
[cargo1]
pos = 1.00 11.80 -0.97 0.00
code = 2
name = Cargo FWD
uldcode = AUTO
[cargo2]
pos = 1.00 -7.10 -0.91 5.00
code = (L:Tds2BEXIT_SW,bool)
name = Cargo AFT
uldcode = AUTO
[cargomain]
remove = 1