I see these errors in the sys_log:
SQL error: 'Unknown column 'tstamp' in 'field list'' (tx_devlog_domain_model_entry:NEW5d7b324c3dc35547020303) (msg#1.1.12)
and in fact this column is missing but referenced in TCA:
$TCA['tx_devlog_domain_model_entry']['ctrl']['tstamp'] => 'tstamp'
on the other hand the error does not show up always...??
Happens in release 3.0.4