This should work most of the time, but is is not without risk.

If the flight gets assigned a gate (which seems to happen in most instances for SK1635), you will be good. Arrival and departure gate will be one and the same. You exit the aircraft through the bridge and can simply remain in the gate area until boarding starts. Easy as pie.

If, instead, SK1635 receives an apron position, more can go wrong. You will be picked up at the apron position with a bus. This bus can be delayed for a variety of reasons. It ain't the norm, but if something goes wrong, it can take 30 min or more until the bus drops you off. The so-called bus gate at which you get dropped off can (and usually will) differ from the (bus) gate SK1636 departs from. It could happen that you have a 10-15 min walk from the bus drop-off point to your departure gate.
I think you would still make SK1636 in the majority of cases. But there definitely is a non-trivial risk in this case.