Weird wrap text behaviour

[poyzn]

Hello,
I'm experiencing some weird behaviour of styles in a file created with axlsx. I created a report file which has ~90 tabs. Each tab is created with the same script. Some tabs in the file have no problems with styles, but others have. It seems that the problem is caused by wrap_text: true property in alignment style. When I add wrap text style for a cell in the final file it adds sometimes a foreground color to the cell, sometimes adds text indent. And I can't figure out the logic and the reasons.

Here's an example. I have a file with ~90 tabs and here're screenshots of the same cell in the file but from different tabs.

Tab 1 (normal):

Tab 2 (indents):

Tab 3,4 (indents and wrong colours):

When I disable word wrap in Excel for the cell, it also removes colour and indent.
Please check the screencast

And one more thing. When I add a new tab to that file ( which was generated by axlsx and includes ~90 tabs ), absolutely new tab, add a sentence to any cell, apply word wrap property to it and try to change font size it doesn't show correct font size until word wrap is disabled.

Any Ideas?