We are getting such errors in logs:

10004:20170411:104516.467 [Z3005] query failed: [0] PGRES_FATAL_ERROR:ERROR: invalid byte sequence for encoding "UTF8": 0xc5 0x27
[insert into alerts (alertid,actionid,eventid,userid,clock,mediatypeid,sendto,subject,message,status,error,esc_step,alerttype) values (59963198,23,461339504,79,1491896716,1,'email@address','device-name: ping trigger: IP.IP.IP.IP: PROBLEM','device-name: ping trigger: IP.IP.IP.IP: PROBLEM

xxxx:
xxxx j?s?ta, xxxx process! xxxxx sa?emšanas br??',0,'',1,0);
]

So far we found 2 workarounds:
a) Changing "br?ža" to "briza"
or
b) Adding dot in next line

Screenshot added.