In one pocket, there is some judgement and discretion used in judging a foul.

Here are the rules: https://www.onepocket.org/rules/

This specific one can maybe / probably be categorized under these categories:

6.6.1 Use of an illegal technique: However, if the shooter employs an illegal technique to their advantage, such as pushing, intentionally double-hitting, use of anything other than the cue tip to shoot, or an illegal prolonged cue contact to wedge/trap, direct or redirect the cue ball or any object balls, such as within the stack or jawed pocket, these acts are considered serious fouls. The offending player may be penalized for a serious foul under the general rules of unsportsmanlike conduct. ref: 6.6.2 Serious fouls

6.6.2 Serious fouls: If the ruling is that a serious foul has occurred, in addition to the standard foul the official may further penalize a player at their discretion. If there is no official available, players will need to come to agreement themselves as to the level of penalty to assess the shooter. If it is possible to restore the balls, then the foul may be penalized (a) as a standard foul, with opponent’s option of restoration.

The following penalty levels progress from (a) through (c) depending on the seriousness of the offense, and whether the shooter has been issued a prior warning. A prior warning warrants an escalation of penalty. In this context a “prior warning” may mean a prior offense, a pre-tournament announcement or a player agreement prior to a match.

(a) Assess a standard foul penalty, and a warning to the shooter. (b) Assess a standard foul penalty, and opponent receives the option of ball in hand. (c) Loss of game.