Custom Field with CommitChanges in Modern UI breaks Grid Copy & Paste functionality

Hi everyone,

I'm facing an issue where adding a custom Decimal field to a grid breaks the standard Copy and Paste functionality in Acumatica. The "Paste" action either fails completely or only updates the first row of the grid.(This only happens in Modern UI)

DAC: 

using PX.Data.BQL;
using PX.Data.EP;
using PX.Data;
using PX.Objects.CN.ProjectAccounting.Descriptor;
using PX.Objects.CS;
using PX.Objects.IN;
using PX.Objects.PM;
using PX.Objects.TX;
using PX.Objects;
using System.Collections.Generic;
using System;

namespace MultipleProject
{
  public class PMQuoteTaskExt : PXCacheExtension<PX.Objects.PM.PMQuoteTask>
  {
    #region UsrSortOrder
            [PXDBInt]
        [PXUIField(DisplayName = "Sort Order")]
    public virtual int? UsrSortOrder { get; set; }
    public abstract class usrSortOrder : PX.Data.BQL.BqlInt.Field<usrSortOrder> { }
    #endregion

    #region UsrQty

        [PXDBDecimal(2)]
        [PXDefault(TypeCode.Decimal, "1.0")]
        [PXUIField(DisplayName = "Quantity")]
    public virtual Decimal? UsrQty { get; set; }
    public abstract class usrQty : PX.Data.BQL.BqlDecimal.Field<usrQty> { }
    #endregion

    #region UsrUOM
            [PXDBString(6, IsUnicode = true, InputMask = ">CCCCCC")]
        [PXUIField(DisplayName = "UOM")]
        [PXSelector(typeof(Search4<INUnit.fromUnit, Aggregate<GroupBy<INUnit.fromUnit>>>),
typeof(INUnit.fromUnit))]

    public virtual string UsrUOM { get; set; }
    public abstract class usrUOM : PX.Data.BQL.BqlString.Field<usrUOM> { }
    #endregion

    #region UsrUnitRate
            [PXDBDecimal(2)]
        [PXDefault(TypeCode.Decimal, "0.0")]
        [PXUIField(DisplayName = "Unit Rate", Enabled = false)]

    public virtual Decimal? UsrUnitRate { get; set; }
    public abstract class usrUnitRate : PX.Data.BQL.BqlDecimal.Field<usrUnitRate> { }
    #endregion

    #region UsrTotal
            [PXDBDecimal(2)]
        [PXDefault(TypeCode.Decimal, "0.0")]
        [PXUIField(DisplayName = "Total", Enabled = false)]

    public virtual Decimal? UsrTotal { get; set; }
    public abstract class usrTotal : PX.Data.BQL.BqlDecimal.Field<usrTotal> { }
    #endregion
  }
}

TS:

import { Messages as SysMessages } from "client-controls/services/messages";
import { PXFieldState,gridConfig,GridFastFilterVisibility,GridPreset,columnConfig,PXFieldOptions } from "client-controls";
import { PM304500 } from "src/screens/PM/PM304500/PM304500";
import { Quote,Tasks } from "src/screens/PM/PM304500/views";

export interface PM304500_Ext extends PM304500 {}
export class PM304500_Ext {}

export interface Quote_Ext extends Quote {}
export class Quote_Ext {

	UsrEmergencyResponse : PXFieldState;
	UsrCustomerPriceClass : PXFieldState;
	UsrSkipPMApproval : PXFieldState;
	UsrScope : PXFieldState<PXFieldOptions.Multiline>;
	UsrAssumptions : PXFieldState<PXFieldOptions.Multiline>;
}

export interface Tasks_Ext extends Tasks {}
export class Tasks_Ext {

	@columnConfig({width: 70})	UsrSortOrder : PXFieldState;
	@columnConfig({width: 100})	UsrQty : PXFieldState<PXFieldOptions.CommitChanges>;
	@columnConfig({width: 72})	UsrUOM : PXFieldState;
	@columnConfig({width: 100})	UsrUnitRate : PXFieldState<PXFieldOptions.Disabled>;
	@columnConfig({width: 100})	UsrTotal : PXFieldState<PXFieldOptions.Disabled>;

}

Even without logic in the graph, this fails, just by having these fields in TS and DAC.