issue seems in the Git version :

FTS search in teh body ends up with looping

Other search call twice the FTS plugin (for no reason)

On 2019-04-03 18:58, @lbutlr via dovecot wrote:

On 3 Apr 2019, at 04:30, Joan Moreau via dovecot <dovecot@dovecot.org> wrote:

doveadm search -u jom@grosjo.net mailbox inbox text milan

Did that search over my list mail and got 83 results, not able to duplicate your issue.

What version of dovecot and have you tried to reindex?

dovecot-2.3.5.1 here.