Searching FT991

[pa7ap]

When i'm trying to search with my ft991 search does work but only with one character or one number.
with 2 or more characters it does respond with no data, only one exception if you search for YSF of FCS than it works.

I did some more testing, search works for more then one character if it returns a full data block, when there are spaces at the end it wont work

Here am i searching for "AM" and i do get an no data

from the logging /var/log/pi-star
D: 2019-11-17 04:21:43.522 03B0: 52 20 41 4D 45 58 45 30 30 37 20 20 20 20 20 20 *R AMEXE007 *
D: 2019-11-17 04:21:43.522 03C0: 20 20 20 20 50 49 2D 53 54 41 52 20 4D 55 4C 54 * PI-STAR MULT*
D: 2019-11-17 04:21:43.522 03D0: 49 20 0D 20 20 20 20 20 20 20 20 20 20 20 20 20 *I . *
D: 2019-11-17 04:21:43.522 03E0: 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 * *
D: 2019-11-17 04:21:43.522 03F0: 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 * *
D: 2019-11-17 04:21:43.523 0400: 20 20 20 20 20 03 EA * ..*
D: 2019-11-17 04:21:55.325 FR Mode Data 2

Block is almost full but still gives an no data.
Any ideas?