Time On Target breaking CK with inputing wrong timecode.

[whaaw]

when entering a time on target without the last 2 zeros, the CK breaks. TOT is still working fine, but when you want to show the TOT on CK the first and the 4th digit dissapear completly on the CK while displaying TOT. Example i want a TOT at 12:45, i put into CK:124500 this works fine, if you put in 1245 without the zeros your not able to get any TOT information out of the CK anymore, for the rest of the flight. However this could be a real behavior, but i couldnt find it in the manual. Tested 1.5.6/1.5.7