[Koha] quotation marks not displaying correctly

[Elaine Bradtke]

Quotation marks in our catalogue are displaying strangely.  I don't know
how long it's been going on (we don't have many records with quotation
marks). We're running 18.11
Here's an example
Fiddle tune history : "bad" tunes
It should read Fiddle tune history : "bad" tunes
https://catalogue.efdss.org/cgi-bin/koha/opac-detail.pl?biblionumber=78890

I've cleared the cache, updated Chrome and also tested it in Firefox. Still
there.
Here's the strange part - if I go in and edit out the " and put in
proper quotation marks, and save it, it seems to stick.  However, if I open
the record for editing, even if I don't touch any fields, it changes back
to "  It also happens to quotation marks in other fields, not just the
title.
I couldn't find a bug reported for this, so I'm wondering if anyone else
has seen this happen, or if it might be some internal problem?

Elaine Bradtke
VWML
English Folk Dance and Song Society | http://www.efdss.org
Cecil Sharp House, 2 Regent's Park Road, London NW1 7AY
Tel    +44 (0) 20 7485 2206 (This number is for the English Folk Dance and
Song Society in London, England. If you wish to phone me personally, send
an e-mail first. I work off site)
--------------------------------------------------------------------------
Registered Company No. 297142
Charity Registered in England and Wales No. 305999
---------------------------------------------------------------------------
"Writing about music is like dancing about architecture"
--Elvis Costello (Musician magazine No. 60 (October 1983), p. 52)