1.19.2 Fabric is being used.

Other configuration values ​​are applied, but the option for experience multiplier is not applied.

He told me to register an issue on github, so I registered.

I will attach part of the config.

{

"meta": {
"comment": "IMPORTANT! Make sure to set override_with_default to false to allow customization of the config",
"override_with_default": false,
"sanitize_config": true,
"rounding_unit": 0.5
},
"perPlayerDifficulty": {
"entities": [
{
"entity_matches": {
"attitude": "ANY",
"entity_id_regex": "twilightforest"
},
"attributes": [
{
"attribute": "generic.max_health",
"value": 1.5
}
],
"experience_multiplier": 1.5
}
]
},
"dimensions": [
{
"world_matches": {
"dimension_regex": "minecraft:overworld"
},
"entities": [
{
"entity_matches": {
"attitude": "ANY",
"entity_id_regex": "skeleton"
},
"attributes": [
{
"attribute": "projectile_damage:generic",
"operation": "ADD",
"randomness": 0.0,
"value": -1.5
}
],
"experience_multiplier": 1.0
}

Fixed in v2.0