SignPost Arrows missing

[carreabian]

Hello, using the latest pongo skin, and here 2017.Q3 maps, I have one problem start to appear, The arrow of the signpost is missing as in pics below.
I have seen such case in the forum months ago, but could not find it again. any solution please. Common guys really need your help which will be appreciated.

Kind regards
Thanks.

Spoiler: screenshots

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Any idea for this problem please? or which file is responssable of the signposts? tried to change the map files but its the same.

Thanks