Ok, this is a little odd-
I was landing in the Embraer E175 at KLAX on TS just now, and had APPR enabled. I don’t normally use it, but figured I’d give it a shot. Everything was set and both indicators were green, the approach was OK, we flared, and… the back wheels hit too softly and we ended up bouncing down the runway.
I ended up taking manual control and setting it down safely. I have been able to recreate this twice on Runway 25L at KLAX in the E175, but nowhere else.
Just don’t land with APPR. I usually set it and around 300ft (sometimes even earlier or later) I take over manual control and land the plane manually. It’s more fun that way and it ensures a safe, smooth landing. A fix for this, I am not aware of one.
I’m going to go out on a limb and just say this the E175 and APPR not meshing well. The APPR has a very aggressive flare which works fine for a lot of aircraft. However, the E175 needs essentially zero flare in this game at a normal approach speed (more so just controlling the descent rate) which means when the APPR flares it will tend to send the E175 back up which is what you are experiencing.
I did test this theory and at a speed which maintains 1 degree pitch up on final, it floats up a bit before setting it down (tested on multiple runways and airports). At 2-3 degrees pitch up it still looks like it wants to go up but the flight spoilers activate before you can do so. This pretty much confirms my theory.
In conclusion, E175 flight mechanics and APPR flight mechanics do not mix.