I was trying to remove the template "koord" from this revision using the following command: python3 pwb.py template -remove "koord". Instead of just removing the {{koord}} template, the script attempted to remove that template plus everything up to the end of the {{formatnum:14500}}.
In order to reproduce, put the following text on a wikipage:
{{koord|53|20|51|N|06|13|43|V|vis=tittel}}
{{infoboks arena
| navn = 3Arena
| bilde = 3Arena, Dublin (geograph 5417559).jpg
| bildetekst =
| kallenavn =
| adresse = North Wall Quay <br />[[Dublin]] D1 <br />D01 EW90 <br />
| beliggenhet =
| land = [[Irland]]
| koordinater =
| høyde = {{koord|53|20|51|N|06|13|43|V}}
| eier = Apollo Leisure Group Ltd.
| drift = Live Nation
| brukere =
| underlag =
| banestørrelse =
| kapasitet = {{formatnum:14500}} publikummere
| arkitekt =
| pris =
| kart =
| tidligere navn = The O<sub>2</sub> {{small|(2008–14)}}
| påbegynt = 2007
| åpnet = 2008
| stengt =
| revet =
}}Then run the command I indicated above.
Expected result: Only the {{koord}} template should be removed, nothing more.
Actual result: Everything from the start of the second {{koord}} template to the end of the {{formatnum:}} code is removed.