(I'm running a Danish version and the English terms may not be precise)
In the Find and the Replace dialog, the [Ignore case] setting is swapped. If I choose to ignore, the case is important and vice versa.
Geany: "Poliff" build 2020-03-22 or later with libraries GTK+ v3.24.20 and GLib v2.64.6
OS: Linux Mint Cinnamon 20
Computer (my PC is almost 4 years old): Intel Core i3-7100 Prozessor Intel HD-Grafik 630 8 Gbyte ram DDR4 120 Gbyte SSD harddisk 1 Tbyte harddisk - Toshiba DT01ACA100 Netcard: 802.11 ac