I don't think this is a glitch, as least not in the same "website does not show correct times or duration because of DST change".

When time changes at either end of the flight, airlines have to adjust their timetables, and with additional considerations such as night curfews (not applicable here, but could be applicable to other flights, which would have a knock-on effect on aircraft or crew planning and availability) or connections to other flights, it often happens that they make significant changes to their whole schedule (not just that flight). They may also take that opportunity to add or remove destinations or flights.

So they will end up basically re-planning their whole schedule.

Now there could be several reasons they decided to plan more time for that flight:

• They noticed they were often late (not saying this is the case here, I haven't looked at the history), so decided to add some more buffer (remember, this is a scheduled time, the flight may well arrive much earlier than the schedule). For flights from Europe, this is especially important due to EC261 compensation they may have to pay out for delays, particularly if there are onward connections.

• They couldn't get matching departure and landing slots at the two airports, so they had to adjust one.

• Seasonal weather patterns may affect winds and/or routing.

• They had to change their usual routing due to geopolitical considerations (wars) but hadn't updated their schedule until now.

• They want to save fuel (not convinced at all this actually works out -- probably a good question for aviation.SE).

There are probably quite a few other reasons that haven't come to mind.

I don't think this is a glitch, as least not in the sense "website does not show correct times or duration because of DST change".

When time changes at either end of the flight, airlines have to adjust their timetables, and with additional considerations such as night curfews (not applicable here, but could be applicable to other flights, which would have a knock-on effect on aircraft or crew planning and availability) or connections to other flights, it often happens that they make significant changes to their whole schedule (not just that flight). They may also take that opportunity to add or remove destinations or flights.

So they will end up basically re-planning their whole schedule.

Now there could be several reasons they decided to plan more time for that flight:

• They noticed they were often late (not saying this is the case here, I haven't looked at the history), so decided to add some more buffer (remember, this is a scheduled time, the flight may well arrive much earlier than the schedule). For flights from Europe, this is especially important due to EC261 compensation they may have to pay out for delays, particularly if there are onward connections.

• They couldn't get matching departure and landing slots at the two airports, so they had to adjust one.

• Seasonal weather patterns may affect winds and/or routing.

• They had to change their usual routing due to geopolitical considerations (wars) but hadn't updated their schedule until now.

• They want to save fuel (not convinced at all this actually works out -- probably a good question for aviation.SE).

There are probably quite a few other reasons that haven't come to mind.