MK 13 mines don't stay on the ground but sinks deeper. No base was destroyed

MK 13 mines don’t stay on the ground but sinks deeper. No base was destroyed.
First base was destroyed but when the bases pop up again the bombs sinks and do nothing to the bases. Only with the MK 13 mines

https://youtu.be/9ulYOG6nINI

I dropped my mines and they did not blow up any ground targets with two-second delay. Has always worked in the past. A definite issue here.

Tried base bombing with them. They do no damage AT ALL to bases or airfields.

Replay:
https://warthunder.com/en/tournament/replay/188584115524451257

I had free drop of 4 mines onto the airfield, which landed precisely where they were meant to.

ZERO damage to the base (and zero score to me in consequence).

same here