Run the function with and without the indicated set of brackets and monitor results.
[[ https://www.dropbox.com/s/8fzym5qmkafvmoy/BIS_fnc_findSafePos_FORMAT.Stratis.pbo?dl=0 | **Repro mission here** ]]
There are two radio triggers. Both execute code that populates the map with dot markers representing valid safe positions.
Radio Alpha ("Broken Format") uses the format found on the Biki: //[[markerPos "blacklist", [250, 500, 45, false]]]//
Radio Bravo ("Correct Format") uses the working format: //[[markerPos "blacklist", 250, 500, 45, false]]//
What happens with the incorrect format is a generic rectangular area is defined using the "center" param (here, "markerPos "blacklist") as the upper right corner. The area appears to extend ~infinitely to the lower left.
[[ https://imgur.com/EBGACpW | Clear map showing area markers ]]
[[ https://imgur.com/XpHbRBu | Broken Format results ]]
[[ https://imgur.com/4uCDO8A | Correct format results ]]