Do you have the same issue if you follow the OP’s steps to reproduce it?
No
Provide extra information to complete the original description of the issue:
-Runway 26R undulates in the sim like in real life.
-If you land late or don’t decelerate after touching down I can see why this undulation might ‘toss [you] back into the air’, however this is not a bug as it is present in real life and therefore a feature of the runway.
-The runway slopes downhill before rising up again, as can be seen in the linked photograph, just before the runway disappears into the fog.
If relevant, provide additional screenshots/video:
https://www.jetphotos.com/photo/6087549 (see below)