As explained so many times, when reporting a problem, you should always include as many details as possible, so it can be tested and possibly reproduced, which of course is the most important step to be eventually fixed.
I tried the first report, SBGR Gate 18, using the default A320, no issues and no errors, other than the fact the default airport I tried, the jetway is on the wrong (right) side of the parking spot, which is clearly a scenery error, but the jetway works.
I tried the other report at KPIT Gate 18, which doesn't exists in the default scenery, so the user must have an add-on scenery, but failed to identify it, so I can't check. I tried another random gate with a jetway and, other than the fact the parking is too small (another scenery problem), if I set it to ignore the size, the jetway works with no errors.
So, please, always include everything in your report like:
- the airplane used
- the scenery used, if it's no default, identify the scenery. If you have a custom GSX profile for it, identify the profile.
- the gate used, of course
- the precise, exact, sequence of operations in GSX. Like if you just called "Operate Jetways", or "Boarding", or something else in another other.