Populate only returning one of the items in the array

I have a model and a controller that are working almost perfectly. The only issue that I’m having is, I’m using populate for 2 fields, that both have 2 IDs, but only the first ID is being populated. I have done quite a bit of searching and have not found a solution. Below are the model and the controller.

Model
const mongoose = require(“mongoose”)

    const TicketSchema = new mongoose.Schema({
        title: {
            type: String,
            required: [true, "Ticket title is required"]
        },
        description: {
            type: String,
            required: [true, "Ticket description is required"]
        },
        assignedDev: {
            type: String,
            required: [true, "Assigned developer is required"]
        },
        submitter: {
            type: String,
            required: [true, "Submitter is required"]
        },
        ticketPriority: {
            type: String,
            enum: ["Lowest", "Low", "Medium", "High", "Highest"],
            default: "Lowest"
        },
        ticketStatus: {
            type: String,
            enum: ["Open", "Resolved", "Closed", "Reopened", "In Progress"],
            default: "Open"
        },
        ticketType: {
            type: String,
            enum: ["Bug", "New Feature", "Improvement", "Task", "Testing"],
            required: [true, "Ticket type is required"]
        },
        ticketHistory: [{
            type: mongoose.Schema.Types.ObjectId,
            ref: "TicketHistory"
        }],
        ticketComment: [{
            type: mongoose.Schema.Types.ObjectId,
            ref: "TicketComment"
        }],
        createdOn: {
            type: Date,
            default: Date.now()
        }
    })

    module.exports = mongoose.model("Ticket", TicketSchema)

Controller
exports.getSingleTicket = async (req, res) => {

    try {

        const ticket = await Ticket.findOne({ _id: req.params.id })

        await ticket.populate("ticketHistory ticketComment").execPopulate()

        res.status(200).json({

            success: true,

            // count: tickets.length,

            data: ticket

        })

    } catch (error) {

        console.error(error)

        return res.status(500).json({ error: "Server Error" })

    }

}