ASSWipe - Cleanlevel 4 removes valid alpha combinations

[begna112]

Original:

{\shad0.5\alpha&HFE&\4a&H00&\xbord70\ybord70\fs174\blur24\an4\c&H1F191B&\fnNyala\b0\move(178,1345,178,-255,20,1021)\4c&HFFF0B8&}Road Traffic Act{\ybord50}\NArticle 2\N{\ybord80}Flashing green light{\ybord60}\Nin the shape of a person

Processed:

Dialogue: 8,0:11:15.78,0:11:16.82,pSigns,,0,0,0,,{\an4\move(178,1345,178,-255,20,1021)\fnNyala\fs174\xbord70\ybord70\shad0.5\c&H1F191B&\4c&HFFF0B8&\alpha&HFE&\blur24}Road Traffic Act{\ybord50}\NArticle 2\N{\ybord80}Flashing green light{\ybord60}\Nin the shape of a person

Note that it removed the \4a tag, despite the fact that it is rendered and is included after \alpha in the sort order.

Cleanlevel 3 does not have this issue.