Hi Sergei Shibanov,
PFB my answer of your queries.
Is it possible use only first two lines for reproduce issue?
Answer- Yes
Answer - htmlString as read html from file as string and pass it, which I have shared.
Htm…...CSY= #=z9BlIXgs=, List 1 #=zXpTsEDg=, List 1 #=z04dzXjo=, Boolean...#=zM6R78iELVOUwC6I6Z60.#=z0v4AuMbh2MPwA3X_Ag==(List 1 #=zbV1UD50=) at #=zgWwdw$...