His words I understand:
1. He has had some minor personal issues over the past few weeks.
-But that trivial thing became a problem for some reason.
2. He thought that the scene after the club scene would be finished soon.
- But, more narration was needed to explain the situation than expected, and the time taken per rendering was longer than expected.
In the case of number 2, please filter and read it because it is "my imagination that has been infinitely expanded."
I wrote a while ago that there may be other characters.
I think this may have expanded or complicated the situation.
Otherwise, if there were other reasons, he would have said, as he did before, "This scene is so hot, so artistic and so important, so my work is being delayed because I'm putting so much effort into it."
So my guess is still valid, but... well... even if they play cunnilingus and blowjob and have sex with whales...