I remeasured the TFs of IM stage after the recovery work of PRM today (detail will be posted later, hoefully).
Holizontal TFs seem better but IMV TF (fig1) is obviously strange.

We will again check the situation below BF tomorrow but it might be due to the upper stage.
In that case, it is hard to access from the lower flange, so it might be necessary to open the top chamber of PRM.

Anyway, we need to check the lower stage tomorrow morning to confirm there is no problem at IM and TM stages.