@s0974748 You seem to have researched the topic quite thoroughly already.
My take: I would split the 2nd pillar into compulsory and non-compulsory part with the idea to only transfer the compulsory part to the new pension fund. As there are no enforcement mechanisms for such cases, you can transfer your non-compulsory part once they actually start to enforce it. My guess is that worst case there will be some kind of administrative fee from your pension fund to deal with this additional money.
More reading on this topic: Second pillar split